Tattoos seem to be made on the skin of the human body, but this is not just a surface art, but is dissolved into the body.
Human skin is divided into three layers, including "epidermis", "dermis" and "subcutaneous tissue". The epidermis is the outer layer of human and animal skin. Formed by the embryonic ectoderm. Has anti-friction and anti-damage effects. The epidermis is the superficial structure of the skin, consisting of multiple layers of flat epithelium. It can be divided into five layers from the basal layer to the surface, namely the basal layer, spinous layer, granular layer, transparent layer and cuticle layer. The dermis is located deep in the epidermis, and is connected to the subcutaneous tissue downward, without obvious boundaries with the latter. There are a variety of connective tissue cells and a large amount of collagen fibers and elastic fibers, which make the skin both elastic and tough. The thickness of the dermis is different. The dermis of the palm and sole is thicker, about 3mm or more, and the eyelid and other places are the thinnest, about 0.6mm. The general thickness is between 1-2mm. If the skin is damaged, we will see the red skin under the epidermal layer, which can feel the pain. This layer is the dermis. The subcutaneous tissue is also called "subcutaneous fat tissue". The subcutaneous fat tissue is a layer of loose tissue. It is a natural cushion that can buffer external pressure. At the same time, it is a thermal insulator and can store energy. In addition to fat, subcutaneous fat tissue is also rich in blood vessels, lymphatic vessels, nerves, sweat glands and hair follicles. Our epidermal skin has no blood vessels, the lower layer gradually transplants the metabolism upward, and the outermost skin (epidermis) gradually peels off. The skin of the best tattoo shop in Shanghai will recover naturally even if it is injured, so in theory, if The tattoo on the epidermis can be eliminated automatically in a period of time, but this is probably a very difficult operation. First, it is very difficult to make the tattoo needle completely not touch the dermis. It is very difficult to operate the tattoo on the epidermis. It is even more difficult to produce beautiful works.
